Headphones



FIG. 1 is a perspective view of headphones showing our new design;

FIG. 2 is another perspective view thereof shown from an interior viewpoint;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a side elevational view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken line showings form no part of the claimed design. 

CLAIM The ornamental design for headphones, as shown and described. 